Thanks for the replies...blue tops are pretty expensive, but if they last that long, probably worth it. I see a few choices on their website, what's the right model?

So you think I've got 2 more years on the batteries? I've got 3 amps hooked to it, including a 500W 1 channel for a JL 12". But I rarely play them with the engine off and I have a battery switch I use religiously when the boat is on the lift/in storage.